# Skully Care vs STL Simple Viewer

The clearest difference is rating: STL Simple Viewer at 4.3 against Skully Care's 3.0. STL Simple Viewer also leads on ratings volume (920 vs 2). Skully Care's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days. Skully Care asks for nothing beyond the download.

STL Simple Viewer holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: STL Simple Viewer has 920 ratings behind it against 2, so its average is the more settled of the two.

Skully Care ships an update every 4 months, STL Simple Viewer every 5 months. The most recent releases landed on October 21, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Skully Care | STL Simple Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/skully-care/id1487915804/reviews) | **[4.3 (920 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews)** |
| Number of ratings | 2 | **920** |
| Positive reviews | — | 18.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 84 MB | 19 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Skully Care](https://appshunter.io/developer/1487915803) | [Victor Bovio](https://appshunter.io/developer/327627515) |

## What reviewers say

### Skully Care

[App page](https://appshunter.io/ios/app/skully-care/id1487915804)

This app helps parents and healthcare professionals monitor and visualize infant head shapes. It provides objective data and visuals for informed decision-making and supports sharing results with professionals for guidance.

**Highlights:** Guided photo capture for head shape visualization, Instant head shape results and visuals, Professional report export for EHR, Exercise library with expert guided videos, Secure and private photo processing, Objective measurements and progress tracking

**In-app purchases:** none


### STL Simple Viewer

[App page](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400)

Easily view and interact with 3D STL CAD models. Supports various file types and offers advanced rendering options for detailed analysis. Get model information and explore interiors with clipping planes.

**Highlights:** View ASCII and Binary STL files, Load STL from ZIP, Rotate, pan, and zoom, Orthogonal and Perspective modes, Model info (triangle count, bounding box), Rendering options (faces, edges, transparency), Clipping plane for interiors

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version (1 week plan) | $0.99 | per 7 days |
| Pro version (1 month plan) | $1.99 | per month |
| Remove Ads | $2.99 | one-time |
| Export Pack | $3.99 | one-time |

**What reviewers like**

- 🚀 Simple and intuitive viewer
- 👍 Useful viewing options
- 💡 Supports multiple file formats

**What reviewers complain about**

- 🐛 Frequent crashes
- 🔋 High battery consumption
- 🚨 Excessive and intrusive ads
- 🔍 Limited functionality for larger files

**Reported bugs**

- App crashes when opening larger STL files
- Inability to open some file formats
- Ads continue to appear even after paying for ad removal

**Requested features**

- Add ability to save color/lighting settings
- Improve stability and reduce crashes
- Provide an ad-free paid version


## Frequently asked questions

### Is Skully Care free?

Skully Care is free to download, with no in-app purchases.

### Is STL Simple Viewer free?

STL Simple Viewer is free to download, with in-app purchases available.

### Which has better reviews, Skully Care or STL Simple Viewer?

STL Simple Viewer is rated higher. Skully Care averages 3.0 out of 5 from 2 ratings, while STL Simple Viewer averages 4.3 from 920 ratings.

### Do Skully Care or STL Simple Viewer have ads?

STL Simple Viewer shows ads; Skully Care does not.

### Which is updated more often, Skully Care or STL Simple Viewer?

Skully Care ships an update every 4 months, and STL Simple Viewer every 5 months. Most recently, Skully Care was updated on October 21, 2026 and STL Simple Viewer on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*